Muscle Soreness and Stiffness in Patients With Chronic or Frequent Episodic Tension Type Headache.

Muscle Soreness and Stiffness in Patients With Chronic or Frequent Episodic Tension Type Headache.

The aim is to investigate muscle soreness and stiffness in patients with Chronic or Frequent Episodic Tension Type Headache before and after treatment with amitriptyline - and to compare the results with healthy individuals.

The muscle stiffness is measured with ultrasonic shear wave elastography in m. masseter, m. sternocleidomastoid and m. Trapezius.

The muscle soreness is measured by palpation of the muscles aided by a so called palpometer.

Inclusion Criteria:

• Chronic Tension type headache or frequent episodic tension type headache with at least ten episodes or more per month throughout three months or more.
• Pericranial muscle tenderness

Exclusion Criteria:

• Other primary headache disorder (with the exception of episodic migraine.)
• Pregnancy or ongoing breastfeeding
• Heart disease that contradicts treatment with amitriptyline
• Drug or substance abuse